Linica Uday. Jan 20, Explanation: Parietal cells are the epithelial cells that secrete HCl and intrinsic factor. Related questions In what organ is the waste from the digestion process collected for eventual disposal? What organs are affected by diverticulitis? What are the names of the tissue layers of the stomach? What are dimensions of the small intestine? What are reasons to explain why the small intestine Where does the process of digestion begin?
Possible Answers: Parietal cells. Correct answer: Parietal cells. Explanation : Pepsinogen is released by chief cells in the stomach, and is the zymogen form of pepsin. G cells and goblet cells secrete gastrin and mucous, respectively, into the stomach. Example Question 5 : Digestive Physiology. Possible Answers: Oxyntic cells. Correct answer: G cells. Explanation : G cells secrete the hormone gastrin. Example Question 6 : Digestive Physiology. Which of the following enzymes becomes activated in a low pH environment?
Possible Answers: Trypsinogen. Correct answer: Pepsinogen. Explanation : The only one of the enzymes listed that becomes activated in the presence of an acidic low pH environment is pepsinogen.
Example Question 7 : Digestive Physiology. Possible Answers: It is active upon secretion. It gets cleaved by trypsin to become catalytically active. It reacts with the hydrochloric acid to become pepsin. Correct answer: It reacts with the hydrochloric acid to become pepsin. Explanation : To become active, hydrochloric acid in the stomach reacts with pepsinogen to make pepsin. Example Question 8 : Digestive Physiology. Possible Answers: chief cell.
Correct answer: chief cell. Explanation : The chief cells of the stomach secrete the proteolytic zymogen pepsinogen. Example Question 9 : Digestive Physiology. Possible Answers: chief. Correct answer: parietal. Explanation : The parietal cells of the stomach begin secreting hydrochloric acid even upon the smell of food before consumption takes place in order to begin the digestion process.
Example Question 10 : Digestive Physiology. Possible Answers: hydrochloric acid. Correct answer: hydrochloric acid. Explanation : Hydrochloric acid, produced by the parietal cells of the stomach, activates the zymogen pepsinogen. Copyright Notice. View AP Biology Tutors. Rachel Certified Tutor. University of Colorado Denver, Masters, Social Alyssa Certified Tutor.
Reanna Certified Tutor. Report an issue with this question If you've found an issue with this question, please let us know. Do not fill in this field. A serosa covers the external surface of the gland in this section. You may be able to find the myenteric plexus Auerbach's plexus between the external and adjacent inner layers of smooth muscle.
Gastrointestinal System I : Stomach The stomach extends from the esophagus to the duodenum; it is divisible into the cardiac, fundus, body, and pyloric regions. Mucus-secreting cells. These cells form the surface epithelium and extend inward to line the gastric pits. Mucous neck cells occur in the junctional region of the gastric pits and glands, and it is in this region that cell proliferation for the renewal of the epithelium occurs.
Parietal cells. These pyramidal or spherical cells appear wedged in between other cells of the gastric glands. They are characterized by their finely granular acidophilic cytoplasm due to an abundance of mitochondria, and by their central, spherical nucleus.
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